Building A Wood Chimney Chase

To build a fire retardant chimney chase one might use fire retardant plywood and sure one could try spraying a fire retardant coating but those are not common practices.

Building a wood chimney chase.

Make the chase enclosure airtight chimneys built on an outside wall whether exposed or boxed with a chase are prone to backdrafting. Now that the frame has been completed guess who gets to clean up all that mess. Framing the chimney chase. Chimney chase a fireplace chase is essentially a knock out area of structure that hides a metal fireplace or cement blocks in a fireplace.

Typically uses 2x4 structural members sheathed with osb or plywood exterior. One solution is to install an insulated and sealed chase and to vent it to the interior so warm air can circulate. Kickout flashings we always install diverter flashings wherever a roof intersects a wall. Build chase of fireplace just like any other wall structure by placing its uprights between plates and top plates to create a large box.

Codes allow a maximum of 90 degf temperature rise above ambient inside the the chimney chase well below the combustion or pyrolysis point for plywood. Nfpa 211 reduces fire hazards by ensuring the safe removal of flue gases the proper installation of solid fuel burning appliances and the correct construction and installation of chimneys fireplaces and venting systems.